Powertrain and method of coordinating chassis and propulsion system torque limits

US10029669B2 · kind B2 · utility

Assignee

• GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventors

• Xiaofeng Mao · Warren, US
• Thomas A. Klingler · Lake Orion, US
• Eric E. Krueger · Chelsea, US
• William R. Cawthorne · Milford, US
• R. Travis Schwenke · Springboro, US
• Scott C. Mrdeza · Owosso, US

Key dates

• Filing date: Nov 16, 2015
• Grant date: Jul 24, 2018
• Expiry date: Jun 27, 2036

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S903/916
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A powertrain includes a propulsion system having first and second torque sources, and first and second drive axles respectively connected to and independently driven by the first and second torque sources. A permissible range of torque contribution from the torque sources to the respective first and second drive axles is defined by a component torque window. The powertrain includes sensors for detecting a dynamic driving maneuver of a vehicle having the powertrain. A controller executes a method to adjust a size and/or orientation of a chassis torque window during the detected dynamic driving maneuver, determine an optimally efficient axle torque operating point that falls on a torque line within the component torque window in proximity to the chassis torque window, and command the torque contribution via transmission of torque control signals to the first and second torque sources to achieve the optimally efficient axle torque operating point.